| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage 2025
|
| Presentation Title |
In-situ formed Ni conjugated nanoparticles for the anode of ammonia solid oxide fuel cells |
| Author(s) |
Jong-Eun Hong, Keejung Kim, Dong Woo Joh, Hye-Sung Kim, Tak-Hyoung Lim, Seok-Joo Park, Rak-Hyun Song |
| On-Site Speaker (Planned) |
Jong-Eun Hong |
| Abstract Scope |
Ammonia solid oxide fuel cells have suffered from Ni coarsening and microstructural change caused by Ni nitriding or re-oxidation, leading to a performance degradation due to an increase in the electrode polarization. Perovskite-based exsolution catalysts have been intensively investigated as an alternative anode for SOFCs owing to a superior catalytic activity and anti-coarsening. In this study, Ni substituted perovskite oxides were synthesized and analyzed for ammonia decomposition. The Ni exsoluted oxide catalysts were then in-situ prepared as conjugated nanoparticles onto an Ni-YSZ SOFC anode and evaluated for cell performance and durability under ammonia fuel operation. Ni exsolution oxides enhanced ammonia cracking at reduced temperatures for increased reactive sites and modified surface electronic configuration. Furthermore, the cell using the conjugated Ni exsolution catalysts improved the performance and durability compared to that of Ni-YSZ based SOFC, which was attributed to the promotion of ammonia cracking and subsequent electrochemical oxidation of H2. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Nanotechnology, Surface Modification and Coatings |